Knock detecting apparatus for internal combustion engines

Details Knock detecting apparatus for internal combustion engines Knock detecting apparatus for internal combustion engines

1981-02-19

1983-11-15

Gill, James J.

Measuring and testing

Engine detonation

Combustion signal compared to reference signal varied by a...

73654, G01L 2322

Patent

active

044148402

ABSTRACT:
A knock detecting apparatus includes a vibrating member with a disk-shaped vibrating portion whose resonant point is in the knock frequency range. The outer peripheral edge of the vibrating member is held substantially over the entire periphery. The vibrating portion of the vibrating member may be provided with holes and an addition such as a protrusion and/or a ring-shaped rib portion so as to vary the natural frequency of the vibrating member. Also, the size and shape of the holes and the cross-sectional area of the addition and/or the diameter of the rib portion may be varied to adjust the natural frequency of the vibrating member.

REFERENCES:
patent: 2275675 (1942-03-01), Draper et al.
patent: 2702883 (1955-02-01), Petroff et al.
patent: 3252016 (1966-05-01), Hayer et al.
patent: 3422311 (1969-01-01), Stanish
patent: 4051395 (1977-09-01), Taylor
patent: 4255965 (1981-03-01), Schulz et al.

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